Long Trip

First, do a Short Trip, which see. The setup at this point is typically a parallelogram. Then the "centers" (that is, the center box) Pass Thru, while the "ends" (that is, the "wings") Cross Fold.

Having the "wings" Cross Fold, essentially a natural Turn and Deal, is a variation that one sometimes hears in other contexts.

\syhlines{g3n,b4s,g2n,b1s}	\sxhBBBs{b2s,...,b1s,...,g4n,g3s}	\sxvlines{b3s,g4n,g3s,b2n}

before Long Trip	after Short Trip	finished